Design and optimization of GRIN lens arrays for high-resolution digital colour presses

H. Ottevaere; D. Broddin; F. Deschuytere; H. Thienpont

doi:10.1117/12.855072

14 May 2010 Design and optimization of GRIN lens arrays for high-resolution digital colour presses

H. Ottevaere, D. Broddin, F. Deschuytere, H. Thienpont

Proceedings Volume 7716, Micro-Optics 2010; 77162K (2010) https://doi.org/10.1117/12.855072
Event: SPIE Photonics Europe, 2010, Brussels, Belgium

Abstract

In this paper we study the optical properties of GRIN lens arrays used in the writing heads of LED-based digital colour presses for 600 dpi printing. The goal of our study was to determine the most critical parameters for achieving a good image quality and to optimise the parameters of these arrays to improve the image quality. The writing head of a colour press consists of a row of LEDs and the light of these LEDs is focused by the GRIN lens array onto a photosensitive drum. The GRIN lens array is used as an imaging system with unit magnification. We started with optical raytracing simulations to determine the optimal working distance of commercial GRIN lens arrays and to evaluate their image quality. Furthermore, we carried out a tolerancing analysis of possible misalignments in the writing head and compared the results from our simulations with the results of an experimental tolerancing study. Finally we explored the possibilities for using the same GRIN lens arrays for 1200 dpi printing.

Citation Download Citation

H. Ottevaere, D. Broddin, F. Deschuytere, and H. Thienpont "Design and optimization of GRIN lens arrays for high-resolution digital colour presses", Proc. SPIE 7716, Micro-Optics 2010, 77162K (14 May 2010); https://doi.org/10.1117/12.855072

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KEYWORDS

GRIN lenses

Tolerancing

Light emitting diodes

Printing

Head

Geometrical optics

Image quality

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